"At long, long last, I am working with someone older than me," Shatner, 82, joked in a statement. The 91-year-old White plays opinionated caretaker Elka Ostrovsky on the show.

The episode marks the premiere of the second half of Season 4, picking up after the winter finale in February. In the episode, Joy (Jane Leeves) uncovers the illegal and risky activities that Elka and Mamie (Georgia Engel) have been up to all season — and Melanie (Valerie Bertinelli), Victoria (Wendie Malick) and Joy try to intervene.

White was a roaster at Shatner's 2006 Comedy Central Roast. He has an ongoing joke (we guess?) about his alleged love affair with the widowed White. "Betty and I have been lovers for a while. That's all out in the open," Shatner told Vanity Fair in 2010. "We're going to do a sex tape for the AARP."